Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/04/2024, 18:06

General

  • Target
    afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e.exe
  • Size 164KB
  • Sample240418-wp4y4acb5x
  • SHA256 afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • HydraCrypt

    Relatively unsophisticated ransomware family based on leaked CrypBoss source code.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (881) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e.exe
    "C:\Users\Admin\AppData\Local\Temp\afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2976
    • C:\Users\Admin\AppData\Local\Temp\afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e.exe
      C:\Users\Admin\AppData\Local\Temp\afd3b729cf99fb9ea441f42862a4835d1d6eeb36ee535f9b206e3a00382c972e.exe
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C net stop vss
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4700
        • C:\Windows\SysWOW64\net.exe
          net stop vss
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1788
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop vss
            5⤵
              PID:400
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /All
          3⤵
            PID:5016
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C wmic shadowcopy delete
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2228
            • C:\Windows\SysWOW64\Wbem\WMIC.exe
              wmic shadowcopy delete
              4⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:824
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=Z: /All
            3⤵
              PID:3056
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=Y: /All
              3⤵
                PID:1588
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=X: /All
                3⤵
                  PID:3020
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=W: /All
                  3⤵
                    PID:800
                  • C:\Windows\SysWOW64\cmd.exe
                    "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=V: /All
                    3⤵
                      PID:2220
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=U: /All
                      3⤵
                        PID:5076
                      • C:\Windows\SysWOW64\cmd.exe
                        "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=T: /All
                        3⤵
                          PID:3560
                        • C:\Windows\SysWOW64\cmd.exe
                          "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=S: /All
                          3⤵
                            PID:4468
                          • C:\Windows\SysWOW64\cmd.exe
                            "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=R: /All
                            3⤵
                              PID:3716
                            • C:\Windows\SysWOW64\cmd.exe
                              "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=Q: /All
                              3⤵
                                PID:5088
                              • C:\Windows\SysWOW64\cmd.exe
                                "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=P: /All
                                3⤵
                                  PID:1740
                                • C:\Windows\SysWOW64\cmd.exe
                                  "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=O: /All
                                  3⤵
                                    PID:1120
                                  • C:\Windows\SysWOW64\cmd.exe
                                    "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=N: /All
                                    3⤵
                                      PID:1568
                                    • C:\Windows\SysWOW64\cmd.exe
                                      "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=M: /All
                                      3⤵
                                        PID:4784
                                      • C:\Windows\SysWOW64\cmd.exe
                                        "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=L: /All
                                        3⤵
                                          PID:4872
                                        • C:\Windows\SysWOW64\cmd.exe
                                          "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=K: /All
                                          3⤵
                                            PID:3260
                                          • C:\Windows\SysWOW64\cmd.exe
                                            "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=J: /All
                                            3⤵
                                              PID:4744
                                            • C:\Windows\SysWOW64\cmd.exe
                                              "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=I: /All
                                              3⤵
                                                PID:2240
                                              • C:\Windows\SysWOW64\cmd.exe
                                                "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=H: /All
                                                3⤵
                                                  PID:3980
                                                • C:\Windows\SysWOW64\cmd.exe
                                                  "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=G: /All
                                                  3⤵
                                                    PID:972
                                                  • C:\Windows\SysWOW64\cmd.exe
                                                    "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=F: /All
                                                    3⤵
                                                      PID:1168
                                                    • C:\Windows\SysWOW64\cmd.exe
                                                      "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=E: /All
                                                      3⤵
                                                        PID:4596
                                                      • C:\Windows\SysWOW64\cmd.exe
                                                        "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=D: /All
                                                        3⤵
                                                          PID:4740
                                                        • C:\Windows\SysWOW64\cmd.exe
                                                          "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=C: /All
                                                          3⤵
                                                            PID:2344
                                                          • C:\Windows\SysWOW64\cmd.exe
                                                            "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=B: /All
                                                            3⤵
                                                              PID:1140
                                                            • C:\Windows\SysWOW64\cmd.exe
                                                              "C:\Windows\System32\cmd.exe" /C vssadmin Delete Shadows /For=A: /All
                                                              3⤵
                                                                PID:3392
                                                              • C:\Windows\SysWOW64\WerFault.exe
                                                                C:\Windows\SysWOW64\WerFault.exe -u -p 1932 -s 964
                                                                3⤵
                                                                • Program crash
                                                                PID:4772
                                                          • C:\Windows\system32\vssvc.exe
                                                            C:\Windows\system32\vssvc.exe
                                                            1⤵
                                                            • Suspicious use of AdjustPrivilegeToken
                                                            PID:5116
                                                          • C:\Windows\SysWOW64\WerFault.exe
                                                            C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1932 -ip 1932
                                                            1⤵
                                                              PID:972

                                                            Network

                                                                  MITRE ATT&CK Enterprise v15

                                                                  Replay Monitor

                                                                  Loading Replay Monitor...

                                                                  Downloads

                                                                  background.png.hydracrypttmp_ID_c8524973

                                                                  • Path C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\background.png.hydracrypttmp_ID_c8524973
                                                                  • Size 126KB
                                                                  • SHA256 b16af8030b8afcdd3e940d3600b63230f189512d21e18640bc4c6f8439874a11
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  overlay.png.hydracrypttmp_ID_c8524973

                                                                  • Path C:\ProgramData\Microsoft\Device Stage\Device\{113527a4-45d4-4b6f-b567-97838f1b04b0}\overlay.png.hydracrypttmp_ID_c8524973
                                                                  • Size 28KB
                                                                  • SHA256 87dbfea16050518a4debbcdc5ece5fc0195e90895e319bf50715eb42e01a6639
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  resource.xml.hydracrypttmp_ID_c8524973

                                                                  • Path C:\ProgramData\Microsoft\Device Stage\Task\{07deb856-fc6e-4fb9-8add-d8f2cf8722c9}\resource.xml.hydracrypttmp_ID_c8524973
                                                                  • Size 1KB
                                                                  • SHA256 90153240c2ec8ad4992bbef401306ad60c9b5f3adec45d245af9d33be79fd058
                                                                  • MD5 SHA1 SHA512

                                                                  winword.exe_Rules.xml.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\winword.exe_Rules.xml.hydracrypttmp_ID_c8524973
                                                                  • Size 333KB
                                                                  • SHA256 e0d3ddd609096d24619a16e5f5ec61f048f7e895b137cd5a8b15f8ff5c7be701
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  desktop.ini.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini.hydracrypttmp_ID_c8524973
                                                                  • Size 174B
                                                                  • SHA256 4c5521f642c88188c41bcaaef3b42a6d734575d15fb23c47b7b23fd436ab57c1
                                                                  • MD5 SHA1 SHA512

                                                                  settings.dat.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\E2A4F912-2574-4A75-9BB0-0D023378592B_cw5n1h2txyewy\Settings\settings.dat.hydracrypttmp_ID_c8524973
                                                                  • Size 8KB
                                                                  • SHA256 38c3bf84b5d5b04f33c0f5fb84e364ab25a6144c58fe76ebcd5baacdac1693be
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  settings.dat.hydracrypt_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.AccountsControl_cw5n1h2txyewy\Settings\settings.dat.hydracrypt_ID_c8524973
                                                                  • Size 8KB
                                                                  • SHA256 0d8e270ae605d3902e280d79583831248a6ff0d8c85b63953225293fe1e6f1b6
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  0.1.filtertrie.intermediate.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{7c913f7c-d3d9-49c5-b502-f29fd5c7e740}\0.1.filtertrie.intermediate.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 5B
                                                                  • SHA256 d0e1dac95565db670c4a58e489c5e67591bfe19dbb9d28d9998ac9bb77c0593b
                                                                  • MD5 SHA1 SHA512

                                                                  0.2.filtertrie.intermediate.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{7c913f7c-d3d9-49c5-b502-f29fd5c7e740}\0.2.filtertrie.intermediate.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 5B
                                                                  • SHA256 7e3bef4ebccee17fab77ccf3dae45bfed57d2ad710d2c8b67ab23567dab476d8
                                                                  • MD5 SHA1 SHA512

                                                                  0.1.filtertrie.intermediate.txt.hydracrypt_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Settings_{d788b5ac-a173-4aea-af65-cc36d50361fe}\0.1.filtertrie.intermediate.txt.hydracrypt_ID_c8524973
                                                                  • Size 269B
                                                                  • SHA256 e11a3de8ae4963b4f1df7356a46bf6f94df85707b37eb3245d04666dad1360ff
                                                                  • MD5 SHA1 SHA512

                                                                  0.2.filtertrie.intermediate.txt.hydracrypt_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Settings_{d788b5ac-a173-4aea-af65-cc36d50361fe}\0.2.filtertrie.intermediate.txt.hydracrypt_ID_c8524973
                                                                  • Size 269B
                                                                  • SHA256 bbe4199d3fed65c2a31a53f7981108d43b01942448f3424322c2fa5ad7ea061c
                                                                  • MD5 SHA1 SHA512

                                                                  AppCache133573951893978108.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133573951893978108.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 77KB
                                                                  • SHA256 35f653bb49ea758f5387bc7ffb35ba29eff437a7e9ad6fad609a164d3907bcf3
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  AppCache133573952470598170.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133573952470598170.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 47KB
                                                                  • SHA256 b1c87c5e3fa38261b81bfa6b7dcdc17e60e3a8adf282744ff9a42ba5eca5b391
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  AppCache133573959125774669.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133573959125774669.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 63KB
                                                                  • SHA256 e75a2e98b6ad26ab168ae4298ad5f72ced1d8493dc891218645ec87c2d94985d
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  AppCache133573962273348529.txt.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133573962273348529.txt.hydracrypttmp_ID_c8524973
                                                                  • Size 75KB
                                                                  • SHA256 9974cc50cf20309e8d1e5034e19d9d321df9a989278046887b338a681610abfe
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  AppCache133573995096058966.txt.hydracrypt_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133573995096058966.txt.hydracrypt_ID_c8524973
                                                                  • Size 75KB
                                                                  • SHA256 5ba857d2869821aa4a3cefcd792380437b94999aff6164f616561e71f9105313
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  Microsoft .NET Framework 4.7.2 Setup_20240412_113835246.html.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Temp\Microsoft .NET Framework 4.7.2 Setup_20240412_113835246.html.hydracrypttmp_ID_c8524973
                                                                  • Size 94KB
                                                                  • SHA256 723de9b7deed458a4009b012634e27883f0ea29e3fb351b7d453914dd7d3a663
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  wct5F27.tmp.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Temp\wct5F27.tmp.hydracrypttmp_ID_c8524973
                                                                  • Size 63KB
                                                                  • SHA256 c7e28e9700c955e14664b7d7ffb7d2353724de4133678a3d0b8bf90bd26d92f0
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  wctDB4C.tmp.hydracrypt_ID_c8524973

                                                                  • Path C:\Users\Admin\AppData\Local\Temp\wctDB4C.tmp.hydracrypt_ID_c8524973
                                                                  • Size 63KB
                                                                  • SHA256 52c7a6f3f0b550c3378b1ab00900bb59d1aff4fbe824151732b9d571e7d4b58f
                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                  1$FUWW$FFHEX.dat

                                                                  • Path C:\Users\Admin\AppData\Roaming\1$FUWW$FFHEX.dat
                                                                  • Size 1KB
                                                                  • SHA256 aa057b2017c778a64862d1a1f3dd5df5e7410110944d9ea56fb0e369c7c754c9
                                                                  • MD5 SHA1 SHA512

                                                                  Desktop.ini.hydracrypttmp_ID_c8524973

                                                                  • Path C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini.hydracrypttmp_ID_c8524973
                                                                  • Size 170B
                                                                  • SHA256 a71085eac21e443ddda11f373e0462bcbe3171eee09b6679160006cd0b708bb2
                                                                  • MD5 SHA1 SHA512

                                                                  README_DECRYPT_HYDRA_ID_c8524973.txt

                                                                  • Path C:\Users\Public\Pictures\README_DECRYPT_HYDRA_ID_c8524973.txt
                                                                  • Size 915B
                                                                  • SHA256 7269843886d1c4ff40011aba0464daccb896d1464dc3de0931c774df3976e65e
                                                                  • MD5 SHA1 SHA512

                                                                  memory/1932-4-0x0000000000400000-0x0000000000978000-memory.dmp

                                                                  memory/1932-3751-0x0000000000400000-0x0000000000978000-memory.dmp

                                                                  memory/1932-3390-0x0000000000400000-0x000000000040E000-memory.dmp

                                                                  memory/1932-3-0x0000000000400000-0x0000000000978000-memory.dmp

                                                                  memory/1932-1-0x0000000000400000-0x0000000000978000-memory.dmp

                                                                  memory/1932-880-0x0000000000400000-0x000000000040E000-memory.dmp

                                                                  memory/1932-5148-0x0000000000400000-0x000000000040E000-memory.dmp

                                                                  memory/1932-5149-0x0000000000400000-0x0000000000978000-memory.dmp

                                                                  memory/2976-0-0x0000000000AA0000-0x0000000000AA5000-memory.dmp